The mechanism and an improved asymmetric allylboration of ketones catalyzed by chiral biphenols

…, PN Moquist, SE Schaus

Index: Barnett, David S.; Moquist, Philip N.; Schaus, Scott E. Angewandte Chemie - International Edition, 2009 , vol. 48, # 46 p. 8679 - 8682

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Citation Number: 90

Abstract

The asymmetric allylboration reaction is an extensively studied synthetic method.[1] The operational simplicity and chiral building blocks afforded readily account for the utility of the reaction.[2] Studies aimed at the development of a catalytic enantioselective allylboration of ketones [3] identified chiral biphenols as effective promoters of the reaction; however, the reaction required the use of relatively high catalyst loadings [Eq.(1)].[4] Reducing catalyst ...